package com.itheima.controller;

import ch.qos.logback.core.util.FileUtil;
import com.itheima.common.R;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.FilenameUtils;
import org.apache.commons.io.IOUtils;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.util.UUID;

@RestController
@RequestMapping("/common")
@Slf4j
public class CommonController {

    @Value("${reggie.path}")
    private String basePath;

    @PostMapping("/upload")
    public R<String> upload(MultipartFile file) {
        String originalFilename = file.getOriginalFilename();
        String extension = FilenameUtils.getExtension(originalFilename);
        String fileName = UUID.randomUUID().toString() + "." + extension;
        File dir = new File(basePath);
        if (!dir.exists()) {
            dir.mkdirs();
        }
        try {
            file.transferTo(new File(basePath + fileName));
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
        return R.success(fileName);
    }

    @GetMapping("/download")
    public void download(String name, HttpServletResponse response) {
        try {
            FileInputStream inputStream = new FileInputStream(new File(basePath + name));
            OutputStream outputStream = response.getOutputStream();
            response.setContentType("image/jpeg");
            response.setHeader("Content-Disposition", "attachment; filename=" + name);
            IOUtils.copy(inputStream, outputStream);
            outputStream.flush();
            inputStream.close();
            outputStream.close();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}
